/**
 * Copyright (c) 2015-2019, Golly Hu 胡高 (3722711@qq.com).
 * <p>
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 * <p>
 * http://www.apache.org/licenses/LICENSE-2.0
 * <p>
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package cn.hg.jfsa.web.directive;

import com.jfinal.kit.StrKit;
import com.jfinal.template.Env;
import com.jfinal.template.io.Writer;
import com.jfinal.template.stat.Scope;

import cn.hg.base.jfinal.directive.annotation.JfsaDirective;
import cn.hg.jfsa.common.directive.BaseDirective;
import cn.hg.jfsa.core.option.Options;

/**
 * @author Golly
 */
@JfsaDirective ("seoTitle")
public class SeoTitleDirective extends BaseDirective {

	@Override
	public void onRender (Env env, Scope scope, Writer writer) {
		String value = this.getPara(0, scope);
		String defaultValue = this.getPara(1, scope);

		if (StrKit.notBlank(defaultValue) && StrKit.isBlank(value)) {
			value = defaultValue;
		}

		if (StrKit.isBlank(value)) {
			value = Options.get("seo_title");
		}

		this.write(writer, value);
	}

}
